MS21076-4R

View detailed technical data, stock status, and sourcing information for: MS21076-4R
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-376-0489

Item Name Code

05280

Assigment Date

05/27/1993 (33 years ago)

A nut with a flanged base of varied shapes which may be plain or mounted by rivets, bolts, welding or integral prongs. An integral feature is incorporated for locking on the threads of a mating member.

3b thread class, prevailing torque all metal design locking feature, 0.098 inches minimum and 0.103 inches maximum mounting hole diameter, 0.254 inches nominal nut counterbore diameter, right-hand thread direction

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class: 3b
Thread Direction: right-hand
Locking Feature: prevailing torque all metal design
Counterbore Diameter: 0.254 inches nominal nut
Mounting Hole Diameter: 0.098 inches minimum and 0.103 inches maximum
Nut Style: plate
Nut Length: 0.801 inches maximum
Nut Height: 0.281 inches maximum
Plate Thickness: 0.027 inches minimum and 0.090 inches maximum
Plate Width: 0.350 inches minimum and 0.500 inches maximum
Nut Counterbore Depth: 0.062 inches minimum nut
Nut Mounting Provision: straight holes
Mounting Hole Arrangement Style: 2 holes
Distance From Aperture Center To Mounting Hole Center: 0.276 inches minimum and 0.286 inches maximum
Center To Center Distance Between Mounting Holes Along Length: 0.560 inches minimum and 0.564 inches maximum
Temp Rating: 800.0 fahrenheit nominal
Thread Series: unjf
Features Provided: floating nut
Thread Quantity Per Inch: 28
Hardness Rating: 49.0 rockwell c maximum
Nominal Thread Size: 0.250 inches
Material: iron alloy 660 overall
Material Document And Classification: ams 5525 assn std single material response or ams 5737 assn std single material response or ams 5732 assn std single material response overall
Precious Material: silver
Surface Treatment: silver overall
Surface Treatment Document And Classification: ams 2410 assn std single treatment response overall

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
MS21076-4R	Plate Self-Locking Nut

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 5310-01-376-0489?

The FSCG of the NSN 5310-01-376-0489 is 5310

Does the NSN 5310-01-376-0489 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-01-376-0489 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 5310-01-376-0489 contain precious materials?

Item contains silver.

Does NSN 5310-01-376-0489 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 5310-01-376-0489 was assigned to the Federal Catalog?

It was assigned 33 years ago, on Thu, May 27, 1993